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Trailer Suspension Parts - Leaf Spring Replacement System

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Trailer Suspension Parts with Leaf Spring Replacement System

Looking for a smoother, calmer tow? A leaf spring replacement system uses slipper springs for better control, and kits are available with shock absorbers. Match spring rating to your axle—use 7K with 7K axles; 8K can work on 3" tubes but rides more aggressive and may need new 3" tie plates or U-bolts. These systems don't include wet bolts, and with slipper springs only one wet bolt fits per leaf spring; check hanger areas for any plumbing first.
They generally do not include wet bolts, and slipper spring layouts use fewer greasable points. You can add wet bolts at the main spring eye to help keep water and rust out. Use a quality high-stress grease during assembly to maintain smooth movement.
Yes, they can noticeably smooth the ride and reduce bounce and fore/aft movement. That helps keep items inside from getting tossed around. Adding shocks with the springs further reduces vibrations and helps the trailer feel more planted.
Go with 7K springs for 7K axles for the best ride. Heavier 8K springs can work but may feel more aggressive and stiff. Match the spring rating to your axle rating to help smooth out road seams and reduce harsh feedback.
Confirm your axle tube diameter; common sizes are 3" and 3-1/2" and larger tubes may need adapters. Verify hanger space so shocks and brackets won't conflict with plumbing or other components. Check if your existing U-bolts are long enough; some setups need new tie plates and U-bolts to fit heavier hardware.